... 3.Moisture:0.1% 4.Insolubles:0.3max heavy calcium carbonate powder in rubber1.useage:as the filling in the ... enhance hardness,rigidity,size ,stability,fire-retardantness,glossiness of products4) Calcium carbonate is used for highpolymer material to improve the craftwork ... Fillers of plastic such as for plastic,rubber,paper,polyvinyl chloride(PVC).Polyethylene(PE),polypropylene(PP),ABS,etc.It is widely ...